Valve



June 5, 1923.

S. HINDS VALVE Filed Feb. 25 1922 NN NN Kom, L L ww 2. N lo n M bu QMN mwN N MN wm W Mw N.; Nm' mmf m, M LNl` N L Patented June 5, 1923.

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SHERWOOD HINDS, OF RICHMOND HEIGHTS,MISSOURI, ASSIGNOR" T0 ST1 LOUIS PUMP & EQUIPMENT COMPANY, lOF ST. LOUIS, `MISSOURI, A CORPORATION" OF.MISSOURI. ,Y

VALVE.

y Application: l'ed February '25g-1922.1' Seriali-No. 539,301.

T 0 all whom t mayconcern:

Be it known that Ifsrrnnwoon I-IrNns, a citizen of the UnitedStates, and' a resident voicItichmond Heights, St. Louis County,

r elements;` and arrangements ofparts,which are exemplified in theconstruction hereinafterl described andthescope of the application of which will-be `indicated =in the following claims.4 l

In -th'e accompanying drawings, in Awhich areshown -two ot lvarious 4possible embodiments of this invention,

.l Fig. 1- is a-'centralfsectional-elevationof one form of valve construction and 2 is. a similar viewof a modification.

. Similar-reference characters indicate corresponding parts throughout bothl viewsof the'- drawings.

Referring Inow more vparticularly to Fig. 1, 'there -is illustrated at 1- a basev or body having. tapered threads at its upper endto receive apipe l(not-shown) ,fthe same threads receiving. anafupper. valve; guide Shaving a central bearing in which the stem of the upper valve 7 is slidably mounted. Upstand-ingv lugs 9 on the., guide facili-tate insertionaand removal of. the guide. .The threads that' receive .the valve guide 3- are nottapered.

In .the cent-ral. .partofthe -bodyis mounteden'` annular member. 11,k rpreferablyk of brass. This. is placedin'the body with litharge,. rand is :held tightly. against the shoulder. nlifby a ringl 151threaded inthe lower part ofthe body. T-hering is provided with spacednotches V2G to'. facilitate insertion and removal. .The member `.11.has seats for the upper valve 7 above mentioned and forthe lower avalve 17. '.,Thestein 19 of the latter is slidably lmounted in 'the valve guide21, which comprisesvv a central bearing 23?: for the valve'stem,` an. outer ringv 25' .apertured forthe screws 27, and a web 29 connecting the bearing and the ring.

yThe 'screws 27 serve 'an additionalfunction, of .holding in', placethe bottoms yori base 31 andthe screen :or )strainer 1The-screen is l.retained by the base, which in turnuis held 'by tliescrews, tubular lspacers 35; being provided around the" screws'. .tow hold4 the basel at .the properl'distance from 'the vlower valve guide; Aand to'xprevent .the5 buckling ofthe: screen, .at the sametimeninsuring retention' of the lscreen 'inuitsfxproper position, on the surface '36.

A machine screw 37 is 'mountedin the lowervalve 17,:1iiorf a .-purpose" hereinafter described.

In4 ,assemblingfthe device the lower .valve is small enough to. pass 'through thezupper aperture 39 Vin the" valveseat 11,:.andl rthe upper valve issmall enough'to pass through the' upper threaded:I aperture 'iir the. body.

and valve: to contain air, the initial .operation of the pump reduces the: .air lpressure inthe upper or= discharge chamber 4 3,.which allows thepressure inthe middle-.on intermedia-te ichamber l5 to open'slightly'v the upper valve 7. v"Ihisreduces thewpressure inthe middle chamber. Further ioperation ofthe pump causes vfurther reductionin .the middle chamber. This I progressiveireduction ofi'pressure in .the :middle .chamber f causesV Vliftingofl the lowervalvei`l7^fiand the drawing of air.- (iftt any) 1 inv-the. lower or inlet chafmberi47 nprinto'thenmiddle chamber. llhen' the.l air '.(if/fnany inpthe inlet chamber. has: been'.reixhaustedaiand liquid viows there," theVA liquid iup j into Vthenmiddle chaii'nbent:tfhence` into-'Lthe upper chamber and tolthezpnmp. pumping, bothva'lves vare iopenrwide; lThe screw 37 .permits lifting of the lower valve to a predetermined extent without causing the upper valve to lift.

The screen eifectively prevents foreign matter from reaching the pump, and at the same time is located so close to the lowermost level of the device, that the pump is able to draw liquid down to almost the level of the bottom of the valve before air can reach the pump and break the suction.

In the modification illustrated in Fig. 2, the lower valve is omitted. This construction sutlices in many installations where the double protection afforded by the two valves in Fig. l is not required.

In view of the above, it will be seen that the several objects of the invention are achieved and other advantageous results attained.

As many changes could be made: in cariying out the above constructions wlthoutdeparting from the scope of the invention, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

I claim:

l. In apparatus of the class described, in combination, a body internally threaded at one end to receive a discharge pipe, an annular member seated in the body and having seats at its upper and lower ends for valves, a valve guide threaded on said threads in the upper end of the body, an -upper valve guided thereby and cooperating with the upper seat, means for holding said member in position against a shoulder in the body, a lower valve guide adj acent said means, a lower valve guided thereby, a base held in position with respect to said body, and a screen or strainer mounted on the body and held in position thereon by a flange on the base.

2. In apparatus of the class described, in combination, a body, a member seated in the body and having seats for valves, valve guides in the upper and lower portions of the body, valves guided thereby and cooperating with the seats, a ring threaded in the lower portion of the body and holding said member in position against a shoulder in the body, tubular spacers registering with apertures in ring and lower guide, screws passing through said spacers and apertures and threaded into said ring, and a base held in position by said screws and spacers.

3. In apparatus of the class described, in combination, a body, an annular member seated in the body and having seats for valves, a valve guide threaded in the upper end of the body, an upper valve guided thereby and cooperating with the upper seat, a ring threaded in the lower portion of 'the body and holding said member in po- 'strainer mounted on the body and held in position thereon by a flange on the base, and a lost-motion connection between the valve. 4t. In apparatus of the class described, in

combination, a body, a member seated therein and having seats for valves, valve guides in the upper and lower portions of the body, valves guided thereby and cooperating with the seats, means for holding said member in position in the body, a base held in position with respect to said body, a screen or strainer mounted on the body and held in position thereon by the base, and a lostmotion connection between the lower valve and the upper valve.

5. In apparatus of the class described, in combination, a body taper-threaded at one end to receive a discharge pipe, an annular member seated in the body with litharge and having seats at its upper and lower ends for valves, a valve guide threaded on non-tapered threads in the upper end of the body, an upper valve guided thereby and cooperating with the upper seat, a ring threaded in the lower portion ofthe body and holding said member in position against a shoulder in the body, a lower valve guide adjacent said ring, a lower valve guided thereby and cooperating with the lower seat, tubular spacers registering with apertures in ring and lower guide, screws passing through said spacers and apertures and threaded into said ring, a base or bottom plate held into position by said screws and spacers, an annular screen or strainer mounted on a reduced end portion of the body and held in position thereon by a flange on the bottom plate, and a screw mounted on the lower valve and projecting toward the upper valve, said screw permitting limited motion of the lower valve independently of the lower valve, and rupon the rising of the lower valve beyond such limit of motion, forcing the upper valve to rise.

6. In apparatus of the class described, in combination, a body internally taperthreaded at one end to reecive a discharge pipe, an annular member seated in the body and having a seat for a valve, a ring holding said member in position in the body, a valve guide threaded on non-tapered threads in the upper part of the body, a valve guided thereby, a base held in position with respect to said body, and a screen or strainer mounted on the body and held in position thereon by the base, the chamber above the valve communicating directly with said pipe.

7. In apparatus of the class described, in

combination, a body adapted to receive a discharge pipe, a member seated in the body and having a seat for a valve, a ring threaded in the body and holding said member in position in the body, a valve guide threaded in the upper part of the body, a valve guided thereby and cooperating with the Y seat, screws threaded into said ring, a base held in position by said screws, and a screen or strainer mounted on the body and held in position thereon by the base.

8. In apparatus of the class described, in combination, a body internally threaded at one end, the end portion of the threads being tapered and the remainder nontapered, the tapered portion being adapted to receive a discharge pipe, an annular member seated in the body and having a seat at its upper end for a valve, a ring threaded der inthe body, a valve guide threaded on said non-tapered threads, a valve guided thereby and cooperating with the seat, tubular spacers registeringwith apertures in ring and guide, screws passing through said spacers and apertures and threaded into said ring, a base or bottom plate held in position by said screws and spacers, and an annular screen or strainer mounted on a reduced end portion of the body and held in position thereon by a flange on the bottom plate.

In testimony whereof, I have signed my name to this specification this 23rd day of February, 1922.

SHERWOOD I-IINDS. 

